Effect of calcination temperature on the structural and electrochemical properties of Ni-rich materials

Abstract

LiNi_0.8Co_0.1Mn_0.1O₂ layered materials were synthesized by solid-state reaction using LiOH.H₂O and hydroxide precursors of composition Ni_0.8Mn_0.1Co_0.1(OH)₂ (NMC) at various calcination temperature. The final LiNi_0.8Co_0.1Mn_0.1O₂ products showed different physical and electrochemical properties depending on their calcination temperatures. The LiNi_0.8Co_0.1Mn_0.1O₂ synthesized at 800 ^oC for 16 h showed the best electrochemical properties with a high discharge capacity over 188 mAh/g with a capacity retention > 96 % after 50 cycles at 1C-rate in a half cell.

Keywords. Lithium ion batteries, Ni-rich material, co-precipitation, LiNi_0.8Co_0.1Mn_0.1O₂.